Businesses have the final say on their property. But the ones that don’t opt to ban guns—such as Starbucks—have become parade grounds of sorts for open-carry advocates.

In 29 states, it’s legal to openly carry a loaded handgun, without any form of government permission. Another 13 allow an unconcealed loaded handgun with a carry permit, according to opencarry.org, a loosely organized forum for the movement.